Exam Review
Dosage Calculation RN Maternal Newborn Proctored Assessment 3.1
Total Questions : 37
Showing 25 questions, Sign in for moreA nurse is preparing to administer docusate sodium PO to a postpartum client who has a prescription for 200 mg/day in two equally divided doses. The client states she has trouble swallowing tablets and capsules. Therefore, the nurse has obtained docusate sodium liquid 50 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it
Explanation
The question is asking for the amount of docusate sodium liquid the nurse should administer per dose. The prescription is for 200 mg/day in two equally divided doses, and the liquid form of the medication is 50 mg/5 mL.
Step 1 is to determine the amount of medication needed per dose. Since the total daily dose is 200 mg and it’s divided into two doses, each dose will be 200 mg ÷ 2 = 100 mg.
Step 2 is to convert this dose from mg to mL using the concentration of the liquid medication. The concentration is 50 mg/5 mL, which means that 1 mL contains 50 mg ÷ 5 = 10 mg of the medication.
Step 3 is to calculate the volume of the medication needed for a 100 mg dose. Since 1 mL contains 10 mg, we need 100 mg ÷ 10 mg/mL = 10 mL.
So, the nurse should administer 10 mL of docusate sodium liquid per dose.
A nurse is preparing to administer enoxaparin 55 mg subcutaneous to a client who has a deep-vein thrombosis after undergoing a cesarean birth. Available is enoxaparin solution for injection 60 mg/0.6 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
60mg=0.6
55mg= 55*0.6/60
Volume (mL) = 0.55 mL
Rounding to the nearest tenth, the nurse should administer 0.6 mL of enoxaparin solution to the client.
A nurse prepares to administer 0.9% sodium chloride 200 mL over 30 min. The nurse should set the IV infusion pump to administer how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Infusion rate (mL/hr) = 200 mL / 0.5 hr Infusion rate (mL/hr) = (200 mL/hr) *2
= 400mls/hr
1.A nurse is caring for a client who is postpartum and has a prescription for oxytocin 10 units IM one time only for the saturation of a perineal pad in 15 min or less. How should the nurse interpret this prescription?
Explanation
The correct answer is Choice B.
Choice A rationale: This is incorrect because the prescription is for one time only, not for repeated doses.Giving the medication each time the client saturates the perineal pad within 15 min could cause uterine hyperstimulation, water intoxication, or hypotension1.
Choice B rationale: This is correct because the prescription is for one time only and the indication is saturation of a perineal pad in 15 min or less.This is a sign of postpartum hemorrhage, which is a common and potentially life-threatening complication of childbirth2.Oxytocin is a uterotonic agent that helps the uterus contract and reduce bleeding3.
Choice C rationale: This is incorrect because waiting 15 min to administer the medication after the client saturates a perineal pad could result in excessive blood loss and hypovolemic shock. The medication should be given as soon as possible after the indication is met.
Choice D rationale: This is incorrect because offering the medication now to prevent saturation of perineal pad is not the intended use of the prescription. The medication is for treatment, not prevention, of postpartum hemorrhage. Prophylactic oxytocin is usually given intravenously or intramuscularly during or immediately after the delivery of the placenta.
A nurse is preparing to administer enoxaparin 55 mg subcutaneously to a client who has a deep-vein thrombosis after undergoing a cesarean birth. Available is enoxaparin solution for injection 60 mg/0.6 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
60mg=0.6ml 55mg= 55*0.6/60
Volume (mL) = 0.55 mL
Rounding to the nearest tenth, the nurse should administer 0.6 mL of enoxaparin solution to the client.
A nurse is reviewing a new prescription for propranolol 200 mg PO daily divided in equal doses every 12 hr for a client who has migraine headaches during the premenstrual period. Available is propranolol solution 4 mg/mL. How many mL should the client self-administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
mL = mg / 4 mL = 100 / 4
mL = 25 / 1
This means that the client needs to take 25 mL of the propranolol solution every 12 hours to get the prescribed dose of 200 mg per day
A nurse is caring for a client who is postpartum and has a prescription for oxytocin 10 units IM one time only for the saturation of a perineal pad in 15 min or less. How should the nurse interpret this prescription?
Explanation
The correct answer is choice B: The prescription states to administer the medication "one time only" if the client saturates the perineal pad within 15 minutes. The nurse should give the medication once when the pad becomes saturated within the specified time frame.
A. Give the medication each time the client saturates the perineal pad within 15 min.
This answer choice is incorrect. The prescription states that the medication is to be given "one time only" for the saturation of a perineal pad in 15 minutes or less. Therefore, it does not specify to administer the medication multiple times if the pad continues to saturate.
C. Wait 15 min to administer the medication after the client saturates a perineal pad.
This answer choice is incorrect. The prescription does not state to wait for 15 minutes before administering the medication. It specifies that the medication should be given if the pad becomes saturated within 15 minutes or less.
D. Offer the medication now to prevent saturation of perineal pad.
This answer choice is incorrect. The prescription does not indicate that the medication should be offered preemptively to prevent saturation of the perineal pad. It is only to be administered if the saturation occurs within 15 minutes
A nurse is caring for a newborn who weighs 3,500 g. The nurse should record the newborn's weight as how many kg. (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
1000g=1kg 3500g=3500*1/1000
=3.5kg
A nurse is caring for a client who is postpartum and has a prescription for oxytocin 10 units IM one time only for the saturation of a perineal pad in 15 min or less. How should the nurse interpret this prescription?
Explanation
The correct answer is choice B. The prescription indicates that the medication should be given "one time only" if the client saturates the perineal pad within 15 minutes.
The nurse should administer the medication once the pad becomes saturated within the specified time frame.
A. Give the medication each time the client saturates the perineal pad within 15 min.
This answer choice is incorrect. The prescription states that the medication should be administered "one time only" for the saturation of a perineal pad in 15 minutes or less. It does not specify giving the medication multiple times.
C. Wait a minute to administer the medication after the client saturates a perineal pad.
This answer choice is incorrect. The prescription does not mention waiting for any specific time before administering the medication. It states that the medication should be given if the pad becomes saturated within 15 minutes or less.
D. Offer the medication now to prevent saturation of the perineal pad.
This answer choice is incorrect. The prescription does not indicate that the medication should be offered preemptively to prevent saturation of the perineal pad. It is only to be administered if the saturation occurs within 15 minutes.
A nurse is caring for an infant. The mother states the infant took 2.5 oz of formula at the last feeding. How many mL should the nurse document as the intake on the 1&O record? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
One US fluid ounce is equal to 29.6 milliliters. Therefore Formula intake in mL = Formula intake in oz × 29.6 Plugging in the given value of 2.5 oz, we get:
Formula intake in mL = 2.5 × 29.6 Formula intake in mL = 74mls
A nurse assists with the admission of a client to the postpartum unit and reviews the client's prescribed medications. The nurse should clarify which of the following prescriptions with the provider.
Explanation
Bisacodyl is a stimulant laxative that works by increasing the activity of the intestines to cause a bowel movement. It is usually used on a short-term basis to treat constipation or to empty the bowels before surgery or certain medical procedures. However, bisacodyl should not be used in postpartum clients who have had a cesarean delivery or an episiotomy, as it may cause straining and increase the risk of bleeding or infection. Therefore, the nurse should clarify this prescription with the provider and suggest an alternative laxative that is safer for postpartum clients, such as docusate sodium or psyllium.
Calcium carbonate 750 mg PO.
There is no need to clarify this prescription. Calcium carbonate is a common supplement used to provide calcium to the body, and it is typically taken orally.
Oxycodone 5 mg PO every 4 hr PRN for severe pain.
There is no need to clarify this prescription. Oxycodone is a strong opioid analgesic commonly used for severe pain management, and the specified dose and frequency are within the usual range.
Ibuprofen 600 mg PO every 6 hr PRN for moderate pain.
There is no need to clarify this prescription. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) commonly used for pain relief, including moderate pain. The specified dose and frequency are within the usual range.
A nurse is preparing to administer ferrous sulfate 120 mg PO two times each day with meals to a client who is at 12 weeks of gestation and has anemia. Available is ferrous sulfate syrup 90 mg/5 mL. How many ml. should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
The question is asking for the volume of ferrous sulfate syrup that the nurse should administer per dose. The desired dose is 120 mg and the available syrup has a concentration of 90 mg/5 mL.
Let’s calculate this step by step:
Step 1: Identify the desired dose, which is 120 mg.
Step 2: Identify the concentration of the available medication, which is 90 mg/5 mL.
Step 3: Set up the equation to solve for the volume (V) in mL. The equation is (Desired dose ÷ Concentration) × Volume of the concentration = V.
Step 4: Substitute the known values into the equation: (120 mg ÷ 90 mg) × 5 mL = V.
Step 5: Solve the equation: V = (1.33) × 5 mL = 6.67 mL.
So, the nurse should administer approximately 6.7 mL of the ferrous sulfate syrup per dose.
A nurse is preparing to administer 0.45% sodium chloride 1,000 mL IV to infuse over 6 hr to a postpartum client. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To find the infusion rate in mL/hr, divide the total volume of fluid by the total time of infusion.
Total volume of fluid = 1,000 mL Total time of infusion = 6 hr
Infusion rate = 1,000 mL / 6 hr = 166.67 mL/hr
Round the answer to the nearest whole number: 167 mL/hr
A nurse is caring for a newborn who weighs 6 lbs. The nurse should record the newborn's weight as how many g? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
The nurse should record the newborn's weight as 2722 g. 1 pound is equal to 453.59237 grams,
6 pounds times 453.59237 grams = 2721.55422 grams
Rounded off = 2722 grams.
A nurse is preparing to administer fentanyl 100 mcg IM one time for pain to a client who is in labor and requests pain medication. Available is fentanyl injection 0.05 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Volume (mL) = Dose (mcg) / Concentration (mcg/mL) Volume (mL) = 100 mcg / 50 mcg/mL
Volume (mL) = 2 mL
Therefore, the nurse should administer 2 mL of fentanyl injection 0.05 mg/mL to the client
A nurse is preparing to administer phytonadione 0.5 mg IM to a newborn. Available in phytonadione injection 1 mg/0.5 mL. How many mL should the nurse plan to administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Amount of injection in mls = Dose ordered (mg) / Dose available Therefore:
Amount of injection in mls = 0.5 mg Therefore;
Amount of injection in mls = 0.5 mg x 0.5 mL / 1 mg Amount of injection in mls = 0.25 mL
A nurse is preparing to administer digoxin 0.25 mg PO to a client who has heart failure and is at 35 weeks of gestation. Available is digoxin 0.125 mg tablets. How many tablets should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
To calculate the number of tablets to administer, you need to divide the prescribed dose by the available dose. In this case, the prescribed dose is 0.25 mg and the available dose is 0.125 mg. Therefore, the number of tablets is:
0.25 mg / 0.125 mg = 2 tablets
The nurse should administer 2 tablets of digoxin 0.125 mg to the client.
A nurse is preparing to administer nalbuphine 10 mg IV via intermittent bolus to a client who is in active labor. Available is nalbuphine 20 mg/ml. How many mL should the nurse plan to administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Dose / Concentration = Volume Plug in the values from the question:
10 mg / 20 mg/ml = 0.5 ml
Round the answer to the nearest tenth:
=0.5 ml
A nurse is preparing to administer lactated Ringer's 1,500 mL IV over 8 hr to a pregnant client who has gastroenteritis. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Infusion rate = Volume / Time Therefore;
Infusion rate= 1,500 mL / 8 hr
Infusion rate = 187.5 mL/hr
Rounded off to the nearest whole number; 188ml/hr
A nurse is preparing to administer oxycodone 10 mg PO every 6 hr PRN for severe pain to a client who is postpartum following a cesarean birth. Available in oxycodone 5 mg tablets. How many tablets should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Number of tablets = (Dose ordered / Dose available) x Frequency Number of tablets = (10 mg / 5 mg) x 1
Number of tablets = 2 x 1 Number of tablets = 2
A nurse is preparing to administer phytonadione 0.5 mg IM to a newborn. Available is phytonadione injection 1 mg/0.5 mL. How many mL should the nurse plan to administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
volume = 0.5 mg / (1 mg/0.5 mL) volume = 0.5 mg x 0.5 mL / 1 mg volume = 0.25 mL
A nurse is preparing to administer lactated Ringer's 1,500 mL IV over 8 hr to a pregnant client who has gastroenteritis. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Infusion rate= Volume / Time
Therefore;
Infusion rate = 1,500 mL / 8 hr Infusion rate = 187.5 mL/hr
Rounded off to the nearest whole number; 188ml/hr
A nurse is preparing to administer dobutamine 12 mcg/kg/min by continuous IV infusion to a preterm newborn who weighs 2 kg. Available is dobutamine 250 mg in 500 mL dextrose 5% in water. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Let’s calculate the IV pump rate for administering dobutamine to a preterm newborn.
Step 1 is to convert the dose from mcg/kg/min to mg/kg/min. We know that 1 mg = 1000 mcg, so we have:
12 mcg/kg/min ÷ 1000 = 0.012 mg/kg/min
Step 2 is to calculate the total amount of dobutamine the newborn needs per minute:
0.012 mg/kg/min × 2 kg = 0.024 mg/min
Step 3 is to convert this to an hourly rate:
0.024 mg/min × 60 min/hr = 1.44 mg/hr
Step 4 is to calculate the volume of the solution that contains this amount of dobutamine. We know that 250 mg of dobutamine is dissolved in 500 mL of solution, so:
(1.44 mg/hr ÷ 250 mg) × 500 mL = 2.88 mL/hr
So, the nurse should set the IV pump to deliver approximately 2.9 mL/hr (rounded to the nearest tenth).
A nurse is preparing to administer 2.5 L of lactated Ringer's to a client. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Step 1: Convert liters to milliliters.
1 liter is equal to 1000 milliliters. Therefore, we can convert 2.5 liters to milliliters as follows:
2.5 liters * 1000 milliliters/liter = 2500 milliliters
Step 2: Round the answer to the nearest whole number.
The answer is 2500 milliliters. Since we are instructed to round to the nearest whole number, we do not need to make any changes.
Therefore, the nurse should administer 2500 mL of lactated Ringer's to the client.
A nurse is preparing to administer medroxyprogesterone 150 mg IM to a client who has requested contraception. Available is medroxyprogesterone solution for injection 150 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Explanation
Dosage (mL) = Ordered dose (mg) / Available dose (mg/mL) Therefore;
Dosage = 150 mg / 150 mg/mL Dosage = 1 mL
Therefore, the nurse should administer 1 mL of medroxyprogesterone solution for injection to the client.
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